Issued:
2011-12-06
Updated:
2011-12-06

RHBA-2011:1656 - mod_nss bug fix update

Synopsis

mod_nss bug fix update

Type/Severity

Bug Fix Advisory

Topic

An updated mod_nss package that fixes several bugs is now available for Red Hat Enterprise Linux 6.

Description

The mod_nss module provides strong cryptography for the Apache HTTP Server via the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, using the Network Security Services (NSS) security library.

This update fixes the following bugs:

  • When the NSS library was not initialized and mod_nss tried to clear its SSL cache on start-up, mod_nss terminated unexpectedly when the NSS library was built with debugging enabled. With this update, mod_nss does not try to clear the SSL cache in the described scenario, thus preventing this bug. (BZ#691502)

  • Previously, a static array containing the arguments for launching the nss_pcache command was overflowing the size by one. This could lead to a variety of issues including unexpected termination. This bug has been fixed, and mod_nss now uses properly sized static array when launching nss_pcache. (BZ#714154)

  • Prior to this update, client certificates were only retrieved during the initial SSL handshake if the NSSVerifyClient option was set to "require" or "optional". Also, the FakeBasicAuth option only retrieved Common Name rather than the entire certificate subject. Consequently, it was possible to spoof an identity using that option. This bug has been fixed, the FakeBasicAuth option is now prefixed with "/" and is thus compatible with OpenSSL, and certificates are now retrieved on all subsequent requests beyond the first one. (BZ#702437)

Users of mod_nss are advised to upgrade to this updated package, which fixes these bugs.

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • mod_nss-1.0.8-13.el6.s390x.rpm
  • mod_nss-debuginfo-1.0.8-13.el6.ppc64.rpm
  • mod_nss-1.0.8-13.el6.ppc64.rpm
  • mod_nss-debuginfo-1.0.8-13.el6.x86_64.rpm
  • mod_nss-1.0.8-13.el6.i686.rpm
  • mod_nss-debuginfo-1.0.8-13.el6.i686.rpm
  • mod_nss-debuginfo-1.0.8-13.el6.s390x.rpm
  • mod_nss-1.0.8-13.el6.x86_64.rpm
  • mod_nss-1.0.8-13.el6.src.rpm

Fixes

CVEs

References

(none)

Additional information